Multilayer ceramic capacitor and board for mounting of the same

ABSTRACT

A multilayer ceramic capacitor may include three external electrodes disposed on a mounting surface of a ceramic body and spaced apart from each other, and first and second lead-out portions extended from a first internal electrode so as to be exposed through the mounting surface of the ceramic body and spaced apart from each other in a length direction of the ceramic body have one or more space portions, respectively, and a board for mounting thereof is provided.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.10-2013-0081736 filed on Jul. 11, 2013 and Korean Patent Application No.10-2014-0079965 filed on Jun. 27, 2014 with the Korean IntellectualProperty Office, the disclosures of which are incorporated herein byreference.

BACKGROUND

The present disclosure relates to a multilayer ceramic capacitor and aboard for mounting of the same.

An example of electronic components using a ceramic material includescapacitors, inductors, piezoelectric elements, varistors, thermistors,and the like.

Among the ceramic electronic components, a multilayer ceramic capacitor(MLCC) has advantages in that it has a small size and a high capacitanceand is easily mounted, and is usefully employed as a decouplingcapacitor disposed in a high frequency circuit such as a power supplycircuit of a large scale integrated circuit (LSI), or the like.

Here, stability of the power supply circuit depends on an equivalentseries inductance (ESL) of the multilayer ceramic capacitor and isrelatively high, particularly in a low ESL.

Therefore, in order to stabilize the power supply circuit, themultilayer ceramic capacitor should have a low level of ESL. This demandhas further increased in accordance with the trend toward an increase ina frequency and a current of an electronic apparatus.

In addition, the multilayer ceramic capacitor is also used as anelectromagnetic interference (EMI) filter as well as being used as thedecoupling capacitor. In this case, the ESL needs to be relatively lowin order to remove high frequency noise and improve attenuationcharacteristics.

In order to decrease ESL, a three-terminal type capacitor in whichinternal electrodes are mounted to be perpendicular to a surface of aboard, and dielectric layers formed using a ceramic material andinternal electrodes formed using a metal are alternately stacked incorner portions and both end surfaces of a ceramic body has beenpartially disclosed.

However, in the three-terminal type multilayer ceramic capacitor, sincecoupling force between the dielectric layer and the internal electrodeis relatively weak, there was a problem that delamination occurs in thecorner portions and both end surfaces of the ceramic body.

SUMMARY

An exemplary embodiment in the present disclosure may provide amultilayer ceramic capacitor capable of decreasing an equivalent seriesinductance (ESL) and preventing occurrence of delamination in cornerportions of a ceramic body and both end surfaces of the ceramic body ina length direction, and a board for mounting of the same.

According to an exemplary embodiment in the present disclosure, amultilayer ceramic capacitor in which three external electrodes aredisposed on a mounting surface of a ceramic body to be spaced apart fromeach other, and first and second lead-out portions extended from a firstinternal electrode so as to be exposed through the mounting surface ofthe ceramic body and spaced apart from each other in a length directionof the ceramic body have one or more space portions, respectively, and aboard for mounting thereof, may be provided.

BRIEF DESCRIPTION OF DRAWINGS

The above and other aspects, features and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a perspective view schematically illustrating a multilayerceramic capacitor according to an exemplary embodiment of the presentdisclosure;

FIG. 2 is a transparent perspective view illustrating a structure ofinternal electrodes of a multilayer ceramic capacitor according to anexemplary embodiment of the present disclosure;

FIGS. 3A and 3B are plan views illustrating first and second internalelectrodes of a multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure;

FIG. 4 is a plan view illustrating a total area S2 of a space portion ofa multilayer ceramic capacitor according to an exemplary embodiment ofthe present disclosure and an area S1 corresponding to the sum of firstor second lead-out portions and the space portion;

FIG. 5 is a plan view illustrating another example of a first internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure;

FIG. 6 is a plan view illustrating another example of a first internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure;

FIG. 7 is a plan view illustrating another example of a second internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure;

FIG. 8 is a perspective view illustrating another example of an externalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure;

FIGS. 9A and 9B are plan views illustrating another example of first andsecond internal electrodes of the multilayer ceramic capacitor of FIG.8;

FIG. 10 is a perspective view illustrating another example of anexternal electrode of the multilayer ceramic capacitor according to anexemplary embodiment of the present disclosure;

FIGS. 11A and 11B are plan views illustrating another example of firstand second internal electrodes of the multilayer ceramic capacitor ofFIG. 10;

FIG. 12 is a perspective view illustrating another example of anexternal electrode of the multilayer ceramic capacitor according to anexemplary embodiment of the present disclosure;

FIGS. 13A and 13B are plan views illustrating another example of firstand second internal electrodes of the multilayer ceramic capacitor ofFIG. 12; and

FIG. 14 is a perspective view schematically illustrating a form in whichthe multilayer ceramic capacitor according to an exemplary embodiment ofthe present disclosure is mounted on a printed circuit board.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present invention will be described indetail with reference to the accompanying drawings. The invention may,however, be embodied in many different forms and should not be construedas being limited to the embodiments set forth herein. Rather, theseembodiments are provided so that this disclosure will be thorough andcomplete, and will fully convey the scope of the invention to thoseskilled in the art. In the drawings, the shapes and dimensions ofelements may be exaggerated for clarity, and the same reference numeralswill be used throughout to designate the same or like elements.

Multilayer Ceramic Capacitor

FIG. 1 is a perspective view schematically illustrating a multilayerceramic capacitor according to an exemplary embodiment of the presentdisclosure; and FIG. 2 is a transparent perspective view illustrating astructure of internal electrodes of the multilayer ceramic capacitoraccording to an exemplary embodiment of the present disclosure.

Referring to FIGS. 1 and 2, a multilayer ceramic capacitor 100 accordingto an exemplary embodiment of the present disclosure may include aceramic body 110, a plurality of first and second internal electrodes121 and 122, first to third lead-out portions 123 to 125, and first tothird external electrodes 131 to 133 formed on a mounting surface of theceramic body 110.

The ceramic body 110 may be formed by stacking a plurality of dielectriclayers 111 in a width direction and then sintering the plurality ofdielectric layers 111. Adjacent dielectric layers 111 may be integratedwith each other so that boundaries therebetween are not readily apparentwithout using a scanning electron microscope (SEM).

A shape of the ceramic body 110 is not particularly limited. Forexample, the ceramic body 110 may have a hexahedral shape.

A direction of a hexahedron of the ceramic body 110 will be defined inorder to clearly describe exemplary embodiments of the presentdisclosure. L, W and T shown in FIG. 2 refer to a length direction, awidth direction, and a thickness direction, respectively.

Further, in the present exemplary embodiment, for convenience ofexplanation, surfaces of the ceramic body 110 opposing each other in thethickness direction will be defined as first and second main surfaces S1and S2, both surfaces of the ceramic body 110 connecting the first andsecond main surfaces S1 and S2 to each other and opposing each other inthe length direction will be defined as first and second end surfaces S3and S4, and both surfaces of the ceramic body 110 opposing each other inthe width direction will be defined as third and fourth side surfaces S5and S6.

The dielectric layer 111 may contain a high-k ceramic material, forexample, a barium titanate (BaTiO₃) based ceramic powder, or the like.However, the present disclosure is not limited thereto as long assufficient capacitance may be obtained.

In addition, the dielectric layer 111 may further contain ceramicadditives, organic solvents, plasticizers, binders, dispersants, and thelike, as needed, in addition to the ceramic powder.

The ceramic additives may contain a transition metal oxide or carbide,rare earth elements, magnesium (Mg), aluminum (Al), or the like.

FIGS. 3A and 3B are plan views illustrating first and second internalelectrodes of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure.

Referring to FIGS. 3A and 3B, the first and second internal electrodes121 and 122, having different polarities, may be alternately disposed toface each other with each of ceramic sheets disposed therebetween, andmay overlap with each other in a stacked direction to contribute tocapacitance of the capacitor, and the ceramic sheets may form thedielectric layers 111.

The first and second internal electrodes 121 and 122 may be electricallyinsulated from each other by the dielectric layer 111 disposedtherebetween.

In addition, the first and second internal electrodes 121 and 122 may beformed using a conductive material, for example, one of silver (Ag),palladium (Pd), platinum (Pt), nickel (Ni), and copper (Cu) or an alloythereof. However, the present disclosure is not limited thereto.

The first and second lead-out portions 123 and 124, extended from thefirst internal electrode 121 so as to be exposed through at least onesurface of the ceramic body 110, may have at least one or more spaceportions 123 c and 124 c, and include a pair of first exposed portions123 a and 124 a exposed from the first internal electrode 121 throughthe first main surface S1 of the ceramic body 110, which is the mountingsurface of the ceramic body 110, and second exposed portions 123 b and124 b extended to be exposed through the first and second end surfacesS3 and S4 of the ceramic body 110 opposing each other in the lengthdirection, respectively.

Here, the space portions 123 c and 124 c, corresponding to portions inwhich ceramic materials having high coupling force contact each other,are secured in corner portions and the first and second end surfaces S3and S4 of the ceramic body 110 in the length direction, and delaminationoccurring in the corner portions and the first and second end surfacesS3 and S4 of the ceramic body 110 may be significantly decreased.

Here, the space portions 123 c and 124 c may have a form in which theyare exposed through at least one surface of the dielectric layer formingthe ceramic body 110. In the present exemplary embodiment, the spaceportions 123 c and 124 c may be formed in positions corresponding tothose of the corner portions of the dielectric layer 111 between thefirst exposed portions 123 a and 124 a and the second exposed portions123 b and 124 b. However, the present disclosure is not limited thereto.

The third lead-out portion 125 may be disposed between the first andsecond lead-out portions 123 and 124 and be extended from the secondinternal electrode 122 so as to be exposed through the first mainsurface S1 of the ceramic body 110.

The first and second external electrodes 131 and 132, having the samepolarity, may be formed on the first main surface S1 of the ceramic body110. In the present exemplary embodiment, the first and second externalelectrodes 131 and 132 may be extended to the first and second endsurfaces S3 and S4 of the ceramic body 110 in the length direction andmay contact the first and second lead-out portions 123 and 124 exposedthrough the first main surface S1 and the first and second end surfacesS3 and S4 of the ceramic body 110, respectively, to thereby beelectrically connected to the first and second lead-out portions 123 and124.

For example, since a relatively wide contact area between the first andsecond lead-out portions 123 and 124 and the first and second externalelectrodes 131 and 132 over the first and second end surfaces S3 and S4and the first main surface S1 of the ceramic body 110 is secured, aneffect of decreasing an equivalent series inductance (ESL) may beobtained.

Here, the first to third external electrodes 131 to 133 may be extendedto portions of the third and fourth side surfaces S5 and S6 of theceramic body 110 in the width direction or be extended to the secondmain surface S2 of the ceramic body 110 and may be formed in a form inwhich they completely cover both end portions of the ceramic body 110,as needed.

The third external electrode 133, having a polarity different from thoseof the first and second external electrodes 131 and 132, may be formedon the first main surface S1 of the ceramic body 110 between the firstand second external electrodes 131 and 132 and may contact the thirdlead-out portion 125 exposed through the first main surface S1 of theceramic body 110 to thereby be electrically connected to the thirdlead-out portion 125.

Here, the first to third external electrodes 131 to 133 may be formedusing a conductive metal, for example, silver (Ag), nickel (Ni), copper(Cu), or the like. The first to third external electrodes 131 to 133 maybe formed by applying and sintering a conductive paste prepared byadding glass frits to a conductive metal powder. However, the presentdisclosure is not limited thereto.

In addition, a plating layer (not shown) may be formed on the first tothird external electrodes 131 to 133, as needed. The plating layer is toincrease adhesion strength between the multilayer ceramic capacitor 100and a printed circuit board when the multilayer ceramic capacitor 100 ismounted on the printed circuit board using a solder.

The plating layer may include, for example, a nickel (Ni) plating layerformed on the first to third external electrodes 131 to 133 and a tin(Sn) plating layer formed on the nickel plating layer. However, thepresent disclosure is not limited thereto.

Meanwhile, the first and second lead-out portions 123 and 124 may beextended so that the first exposed portions 123 a and 124 a are furtherexposed from the first internal electrode 121 through the second mainsurface S2 of the ceramic body 110.

In addition, a fourth lead-out portion 126 may be further formed to beextended so as to be exposed from the second internal electrode 122through the second main surface S2 of the ceramic body 110.

The fourth lead-out portion 126 may be disposed between the first andsecond lead-out portions 123 and 124 so as to be spaced apart from thefirst and second lead-out portions 123 and 124.

Here, a fourth external electrode 134 may be formed on the second mainsurface S2 of the ceramic body 110 between the first and second externalelectrodes 131 and 132.

The fourth external electrode 134 may contact a portion of the fourthlead-out portion 126 exposed through the second main surface S2 of theceramic body 110 to thereby be electrically connected to the exposedportion.

As described above, in the case in which the first and second lead-outportions 123 and 124 and the fourth lead-out portion 126 are led to thesecond main surface S2 of the ceramic body 110 to form internal andexternal structures of the multilayer ceramic capacitor 100 as avertically symmetrical structure, directivity of the capacitor may beremoved.

Therefore, since any of the first and second main surfaces S1 and S2 maybe provided as amounting surface at the time of surface-mounting thecapacitor, a direction of the mounting surface at the time of mountingthe multilayer ceramic capacitor 100 on the board needs not to beconsidered.

FIG. 4 is a plan view illustrating an area of a space portion of themultilayer ceramic capacitor according to an exemplary embodiment of thepresent disclosure and an area corresponding to the sum of the lead-outportions and the space portion, and the following Table 1 illustrateswhether or not delamination occurs depending on a value of S2/S1 andvalue A to be described below and an ESL value.

TABLE 1 Delamination Sam- S1 S2 A occurrence ESL ple (μm²) (μm²) S2/S1(μm) rate (%) (pH) 1 36024 0 0.0% 125.4 4.5 52.2 2 36023 1915 5.3% 125.21.0 52.3 3 36028 2144 6.0% 100.4 0.5 52.8 4 36018 3592 10.0% 100.1 0.052.9 5 36032 3587 10.0% 99.8 0.0 52.9 6 36034 3589 10.0% 85.5 0.0 53.1 736011 10048 27.9% 85.0 0.0 53.2 8 36025 15844 44.0% 85.1 0.0 53.2 936018 23250 64.6% 85.4 0.0 53.4 10 36030 28827 80.0% 85.2 0.0 53.7 1136009 28833 80.1% 52.4 0.0 54.0 12 36025 28848 80.1% 48.2 0.0 54.3 1336019 32467 90.1% 36.0 0.0 54.9 14 36022 34562 95.9% 28.3 0.0 60.2

Referring to FIG. 4 and Table 1, when a total area of the space portion123 c or 124 c included in the first or second lead-out portion 123 or124 is S2 and an area corresponding to the sum of an area of the firstor second lead-out portion 123 or 124 and S2 is S1, S2/S1 may satisfythe range of 10.0% to 90.1% as in Samples 4 to 13 of Table 1.

When the value of S2/S1 is less than 10.0%, delamination may occur as inSamples 1 to 3 of Table 1, and when the value of S2/S1 exceeds 90.1%, anESL value exceeds 55 as in Sample 14 of Table 1, such that it may bedifficult to implement a relatively low level of ESL.

When a minimum width of the first or second lead-out portion 123 or 124,for example, a width of the first exposed portion 123 a or 124 a in thepresent exemplary embodiment, is A, A may satisfy the range of 36.0μm≦A≦100.1 μm as in Samples 4 to 13 of Table 1.

When the value A is less than 36.0 μm, it may be difficult to implementthe relatively low level of ESL as in Sample 14 of Table 1, and when thevalue A exceeds 100.1 μm, the delamination may occur as in Samples 1 to3 of Table 1.

In addition, when a width of a band part of the first or second externalelectrode 131 or 132, for example, a width of a portion formed on thesecond main surface, which is a mounting surface of the ceramic body110, is defined as B, the value A may be equal to or less than the valueB.

Here, in a case in which the value A is larger than the value B, theinternal electrode is externally exposed, such that reliability may besignificantly decreased due to permeation of a plating solution,permeation of external moisture, and the like, in a plating process.

Modified Example

FIG. 5 is a plan view illustrating another example of a first internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure.

Here, since a structure in which the ceramic body 110, the first andsecond internal electrodes 121 and 122, the first to third externalelectrodes 131 to 133, and the like, are formed is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and first and second lead-out portions 123′ and 124′ havinga structure different from that of the foregoing exemplary embodiment ofthe present disclosure will be described in detail.

Referring to FIG. 5, the first and second lead-out portions 123′ and124′ may be formed in positions corresponding to corner portions of thedielectric layer 111 and be formed in positions corresponding to upperand lower corner portions vertically opposing each other, respectively,as needed.

Therefore, a space portion 123 c′ or 124 c′ may be positioned betweenthe first or second lead-out portions 123′ or 124′ formed in upper andlower corner portions of the first internal electrode 121 and may beformed so as to be exposed through the first or second end surface ofthe dielectric layer 111 in the length direction.

FIG. 6 is a plan view illustrating another example of a first internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure.

Here, since a structure in which the ceramic body 110, the first andsecond internal electrodes 121 and 122, the first to third externalelectrodes 131 to 133, and the like, are formed is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and first and second lead-out portions 123″ and 124″ havinga structure different from that of the foregoing exemplary embodiment ofthe present disclosure will be described in detail.

Referring to FIG. 6, the first and second lead-out portions 123″ and124″ may include first exposed portions 123 a′ and 124a′ exposed throughthe first and second main surfaces of the dielectric layer 111 and aplurality of second exposed portions 123 b′ and 124b′ exposed throughthe first and second end surfaces of the dielectric layer 111.

Here, first space portions 123 c′ and 124c′ may be provided between thefirst exposed portions 123 a′ and 124a′ and the second exposed portions123 b′ and 124b′, for example, in positions corresponding to upper andlower corner portions of the dielectric layer 111, respectively, andsecond space portions 123 d′ and 124d′ may be provided between therespective second exposed portions 123 b′ and 124b′ so as to be exposedthrough the first and second end surfaces of the dielectric layer 111,respectively.

FIG. 7 is a plan view illustrating another example of a second internalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure.

Here, since a structure in which the ceramic body 110, the first andsecond internal electrodes 121 and 122, the first to third externalelectrodes 131 to 133, and the like, are formed is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and third and fourth lead-out portions 125′ and 126′ havinga structure different from that of the foregoing exemplary embodiment ofthe present disclosure will be described in detail.

Meanwhile, referring to FIG. 7, the third and fourth lead-out portions125′ and 126′ may have one or more space portion 125 a′ and 126a′,respectively, so as to be exposed through the first and second mainsurfaces of the dielectric layer 111, respectively.

FIG. 8 is a perspective view illustrating another example of an externalelectrode of the multilayer ceramic capacitor according to an exemplaryembodiment of the present disclosure; and FIGS. 9A and 9B are plan viewsillustrating another example of first and second internal electrodes ofthe multilayer ceramic capacitor of FIG. 8.

Here, since a structure of the ceramic body 110 is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and first to third external electrodes 1310 to 1330 andfirst and second internal electrodes 1210 and 1220 having a structuredifferent from that of the foregoing exemplary embodiment of the presentdisclosure will be described in detail.

Referring to FIGS. 8 through 9B, the first to third external electrodes1310 to 1330 may be formed only on the bottom surface of the ceramicbody 110 and be extended to portions of the third and fourth sidesurfaces of the ceramic body 110, as needed.

In addition, the first internal electrode 1210 may include first andsecond lead-out portions 1230 and 1240 exposed through the bottomsurface of the ceramic body 110 to thereby be electrically connected tothe first and second external electrodes 1310 and 1320, respectively.

Here, the first internal electrode 1210 may include space portions 1231and 1241 formed on both end portions thereof in the length direction.

The second internal electrode 1220 may include a third lead-out portion1250 positioned between the first and second lead-out portions 1230 and1240 and exposed through the bottom surface of the ceramic body 110 tothereby be electrically connected to the third external electrode 1330.

FIG. 10 is a perspective view illustrating another example of anexternal electrode of the multilayer ceramic capacitor according to anexemplary embodiment of the present disclosure; and FIGS. 11A and 11Bare plan views illustrating another example of first and second internalelectrodes of the multilayer ceramic capacitor of FIG. 10.

Here, since a structure of the ceramic body 110 is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and first to third external electrodes 1310 to 1330 andfirst and second internal electrodes 1210 and 1220 having a structuredifferent from that of the foregoing exemplary embodiment of the presentdisclosure will be described in detail.

Referring to FIGS. 10 through 11B, the first to third externalelectrodes 1310 to 1330 may be extended to portions of the third andfourth side surfaces of the ceramic body 110, respectively, as needed.

In addition, an insulating layer 150 may be disposed on the top surfaceS2 of the ceramic body 110 opposing the mounting surface of the ceramicbody 110.

The first internal electrode 1210 may include first and second lead-outportions 1230 and 1240 exposed through the bottom surface of the ceramicbody 110 to thereby be electrically connected to the first and secondexternal electrodes 1310 and 1320, respectively.

In addition, the first internal electrode 1210 may have first and secondlead-out portions 1230′ and 1240′ exposed through the top surface of theceramic body 110 to thereby contact the insulating layer 150 formed onthe top surface of the ceramic body 110.

Here, the first internal electrode 1210 may include space portions 1231and 1241 formed on both end portions thereof in the length direction.

The second internal electrode 1220 may include a third lead-out portion1250 exposed through the bottom surface of the ceramic body 110 tothereby be electrically connected to the third external electrode 1330and a fourth lead-out portion 1260 exposed through the top surface ofthe ceramic body 110 to thereby contact the insulating layer 150,between the first and second lead-out portions 1230, 1230′, 1240, and1240′, respectively.

FIG. 12 is a perspective view illustrating another example of anexternal electrode of the multilayer ceramic capacitor according to anexemplary embodiment of the present disclosure; and FIGS. 13A and 13Bare plan views illustrating another example of first and second internalelectrodes of the multilayer ceramic capacitor of FIG. 12.

Here, since a structure of the ceramic body 110 is the same as that ofthe foregoing exemplary embodiment of the present disclosure, a detaileddescription thereof will be omitted so as to avoid an overlappingdescription, and first to third external electrodes 1310 to 1330 andfirst and second internal electrodes 1210 and 1220 having a structuredifferent from that of the foregoing exemplary embodiment of the presentdisclosure will be described in detail.

Referring to FIGS. 12 through 13B, the first to third externalelectrodes 1310, 1310′, 1320, 1320′, 1330, and 1330′ may be formed onthe top and bottom surfaces of the ceramic body 110 in a symmetricalform in which they oppose each other and may be extended to portions ofthe third and fourth side surfaces of the ceramic body 110,respectively, as needed.

In addition, the first internal electrode 1210 may include first andsecond lead-out portions 1230 and 1240 exposed through the bottomsurface of the ceramic body 110 to thereby be electrically connected tothe first and second external electrodes 1310 and 1320, respectively.

In addition, the first internal electrode 1210 may include first andsecond lead-out portions 1230′ and 1240′ exposed through the top surfaceof the ceramic body 110 to thereby be electrically connected to thefirst and second external electrodes 1310′ and 1320′ formed on the topsurface of the ceramic body 110, respectively.

Here, the first internal electrode 1210 may include space portions 1231and 1241 formed on both end portions thereof in the length direction.

The second internal electrode 1220 may include a third lead-out portion1250 exposed through the bottom surface of the ceramic body 110 tothereby be electrically connected to the third external electrode 1330and a fourth lead-out portion 1260 exposed through the top surface ofthe ceramic body 110 to thereby be electrically connected to the thirdexternal electrode 1330′, between the first and second lead-out portions1230, 1230′, 1240, and 1240′, respectively.

Board for Mounting of Multilayer Ceramic Capacitor

FIG. 14 is a perspective view schematically illustrating a form in whichthe multilayer ceramic capacitor according to an exemplary embodiment ofthe present disclosure is mounted on a printed circuit board.

Referring to FIG. 14, a board 200 for mounting of a multilayer ceramiccapacitor according to the exemplary embodiment of the presentdisclosure may include a substrate 210 on which the multilayer ceramiccapacitor 100 is mounted, and first to third electrode pads 211 to 213formed on an upper surface of the substrate 210 so as to be spaced apartfrom each other.

Here, the multilayer ceramic capacitor may be electrically connected tothe substrate 210 by solders (not shown) in a state in which the firstmain surface S1 of the ceramic body 110 in the thickness direction,which is amounting surface, is disposed to be provided as a lowersurface thereof at the time of mounting thereof on the board 210, and ina state in which lower surfaces of the first to third externalelectrodes 131 to 133 are positioned on the first to third electrodepads 211 to 213 so as to contact the first to third electrode pads 211to 213, respectively.

In the multilayer ceramic capacitor 100 according to the presentexemplary embodiment, since the first and second internal electrodes aredisposed perpendicularly to the substrate 210, a current flows from thefirst to third electrode pads 211 to 213 disposed on the substrate 210to be adjacent to one another to the first and second internalelectrodes 121 and 122 through the first to third external electrodes131 to 133, such that a current path may be shortened.

Therefore, according to an exemplary embodiment of the presentdisclosure, an ESL value may be decreased as compared with a multilayerceramic capacitor having a structure of internal electrodes disposedhorizontally to the substrate, for example, a printed circuit board anda structure of external electrodes disposed to correspond thereto. TheESL value may be further decreased as the number of stacked internalelectrodes is increased.

As an application example, in the case in which the multilayer ceramiccapacitor is used as a three-terminal EMI filter, the first and secondexternal electrodes may be connected to input and output terminals of asignal line, respectively, and the third external electrode may beconnected to a ground terminal to remove high frequency noise of thesignal line.

In this case, the first and second electrode pads 211 and 212, which arepositive (+) poles, may correspond to the input/output terminals,respectively, and the third electrode pad 213, which is a negative (−)pole, may correspond to the ground terminal.

As another application example, in the case in which the multilayerceramic capacitor is used as a decoupling capacitor, the first andsecond external electrodes may be connected to a power supply line andthe third external electrode may be connected to a ground line tostabilize a power supply circuit.

In this case, the first and second electrode pads 211 and 212 maycorrespond to the power supply line and the third electrode pad 213 maycorrespond to the ground line.

Meanwhile, although a form in which the multilayer ceramic capacitor ofFIG. 1 is mounted on the printed circuit board has been shown in FIG.14, the present disclosure is not limited thereto. For example, themultilayer ceramic capacitors illustrated in FIGS. 8, 10, and 12 mayalso be mounted on the printed circuit board in a similar structure toconfigure the board having a multilayer ceramic capacitor mountedthereon.

According to exemplary embodiments of the present disclosure, since ESLof the multilayer ceramic capacitor may be decreased, in the case inwhich the multilayer ceramic capacitor is used as a decouplingcapacitor, an EMI filter, or the like, voltage variation of a powersupply circuit may be more effectively suppressed, and high frequencyattenuation characteristics and a high frequency noise removing effectmay be improved.

In addition, parts in which the dielectric layers formed using ceramicmaterials having high coupling force contact each other may be securedin the corner portions of the ceramic body and both end surfaces of theceramic body in the length direction, whereby occurrence of delaminationin the corner portions of the ceramic body and both end surfaces of theceramic body in the length direction may be prevented

While exemplary embodiments have been shown and described above, it willbe apparent to those skilled in the art that modifications andvariations could be made without departing from the spirit and scope ofthe present disclosure as defined by the appended claims.

What is claimed is:
 1. A multilayer ceramic capacitor comprising: aceramic body including a plurality of dielectric layers stacked in awidth direction; a plurality of first and second internal electrodesalternately disposed to have a respective dielectric layer interposedbetween the first and second internal electrodes; first and secondlead-out portions each having one or more space portions and extendedfrom the first internal electrode to be exposed through a mountingsurface of the ceramic body and spaced apart from each other in thelength direction of the ceramic body; a third lead-out portion extendedfrom the second internal electrode to be exposed through the mountingsurface of the ceramic body and disposed between the first and secondlead-out portions; first and second external electrodes disposed on themounting surface of the ceramic body to be spaced apart from each otherin the length direction of the ceramic body and connected to the firstand second lead-out portions, respectively; and a third externalelectrode disposed between the first and second external electrodes andconnected to the third lead-out portion.
 2. The multilayer ceramiccapacitor of claim 1, wherein when a total area of the space portionsincluded in the first or second lead-out portion is S2 and an areacorresponding to the sum of an area of the first or second lead-outportion and S2 is S1, S2/S1 ranges from 10.0% to 90.1%.
 3. Themultilayer ceramic capacitor of claim 1, wherein when a minimum width ofthe first or second lead-out portion exposed to the mounting surface ofthe ceramic body is A and a width of the first or second externalelectrode formed on the mounting surface of the ceramic body is B, 36μm≦A≦100.1 μm and A≦B.
 4. The multilayer ceramic capacitor of claim 1,wherein the first and second lead-out portions are extended from thefirst internal electrode to be exposed through a surface of the ceramicbody opposing the mounting surface of the ceramic body and both endsurfaces of the ceramic body in the length direction, the first andsecond external electrodes are disposed on both end surfaces of theceramic body in the length direction, respectively, and are extendedfrom both end surfaces of the ceramic body in the length direction toportions of both side surfaces of the ceramic body in the widthdirection and a portion of the surface of the ceramic body opposing themounting surface of the ceramic body, and the second internal electrodeis disposed to be spaced apart from both end surfaces of the ceramicbody in the length direction.
 5. The multilayer ceramic capacitor ofclaim 1, further comprising: a fourth lead-out portion extended from thesecond internal electrode to be exposed through a surface of the ceramicbody opposing the mounting surface of the ceramic body and disposedbetween the first and second lead-out portions; and a fourth externalelectrode disposed between the first and second external electrodes,extended from the surface of the ceramic body opposing the mountingsurface of the ceramic body to portions of both side surfaces of theceramic body in the width direction, and connected to the fourthlead-out portion.
 6. The multilayer ceramic capacitor of claim 1,wherein the first and second internal electrodes are disposed to bespaced part from both end surfaces of the ceramic body in the lengthdirection.
 7. The multilayer ceramic capacitor of claim 6, wherein thefirst to third external electrodes are extended from the mountingsurface of the ceramic body to portions of both side surfaces of theceramic body in the width direction.
 8. The multilayer ceramic capacitorof claim 6, further comprising: fourth and fifth lead-out portionsextended from the first internal electrode to be exposed through asurface of the ceramic body opposing the mounting surface of the ceramicbody and disposed be spaced apart from each other in the lengthdirection of the ceramic body; a sixth lead-out portion extended fromthe second internal electrode to be exposed through the surface of theceramic body opposing the mounting surface of the ceramic body anddisposed between the fourth and fifth lead-out portions; and aninsulating layer disposed on the surface of the ceramic body opposingthe mounting surface of the ceramic body.
 9. The multilayer ceramiccapacitor of claim 6, further comprising: fourth and fifth lead-outportions extended from the first internal electrode to be exposedthrough a surface of the ceramic body opposing the mounting surface ofthe ceramic body and disposed to be spaced apart from each other in thelength direction of the ceramic body; a sixth lead-out portion extendedfrom the second internal electrode so as to be exposed through thesurface of the ceramic body opposing the mounting surface of the ceramicbody and disposed between the fourth and fifth lead-out portions; fourthand fifth external electrodes disposed on the surface of the ceramicbody opposing the mounting surface of the ceramic body so as to bespaced apart from each other in the length direction of the ceramic bodyand connected to the fourth and fifth lead-out portions, respectively;and a sixth external electrode disposed between the fourth and fifthexternal electrodes, extended from the surface of the ceramic bodyopposing the mounting surface of the ceramic body to portions of bothside surfaces of the ceramic body in the width direction, and connectedto the sixth lead-out portion.
 10. The multilayer ceramic capacitor ofclaim 1, wherein the space portion provided in the first or secondlead-out portion is exposed through one end surface of the ceramic bodyin the length direction.
 11. The multilayer ceramic capacitor of claim10, wherein the space portion provided in the first or second lead-outportion is provided in a corner portion connecting a surface of theceramic body opposing the mounting surface of the ceramic body and oneend surface of the ceramic body in the length direction to each other.12. The multilayer ceramic capacitor of claim 10, wherein the spaceportion provided in the first or second lead-out portion is exposedthrough a corner portion connecting the surface of a ceramic bodyopposing the mounting surface of the ceramic body and one end surface ofthe ceramic body in the length direction to each other and one endsurface of the ceramic body in the length direction.
 13. The multilayerceramic capacitor of claim 1, wherein the third lead-out portion has aspace portion exposed through the mounting surface of the ceramic body.14. The multilayer ceramic capacitor of claim 5, wherein the fourthlead-out portion has a space portion exposed through the surface of theceramic body opposing the mounting surface of the ceramic body.
 15. Aboard for mounting of a multilayer ceramic capacitor, comprising: asubstrate on which first to third electrode pads are disposed; and themultilayer ceramic capacitor of claim 1 including the first to thirdexternal electrodes disposed on the first to third electrode pads,respectively.